Research Method Of Driver's Lane Conversion Intention Mapping Parameters

Vehicle lane change is a kind of typical driving behavior pattern which is influenced by drivers,vehicles,roads,environment and other related factors,in which the driver's behavior plays a decisive role in the lane change behavior.When the driver of the car and the collision vehicle distance and relative speed and other judgments are not accurate,or the surrounding information observation or interpretation is not sufficient,easily lead to rear-end,rubbing and other traffic accidents.In the current vehicle,the lane change assist system uses the turn signal to predict the driver's lane change behavior.When the target vehicle is identified within a given distance range,the driver is warned.System in the actual work process,missed alarm and false alarm problems,can not achieve the desired auxiliary driving function.If the system can identify the driver in advance to change the intention,no longer rely solely on the turn signal signal on the lane auxiliary system work efficiency has greatly improved,but also to the driver has sufficient response time to deal with the potential change Dangerous,to ensure the safety of the lane change.In this paper,51 drivers were selected to carry out the actual vehicle test on the selected sections,and the relevant parameters,such as visual search and operating characteristics,which reflect the behavior of the driver,were collected to provide the corresponding data support for the extraction of the channel mapping parameters.The horizontal position of the vehicle in the lane and the steering wheel angle are used as the index for determining the starting time of the lane change.Analysis of the actual vehicle test data found in the road before and after the implementation of a certain period of time there are three consecutive 5-wheel within the distance from the lane line direction is the same direction,and the first two 5 within the distance change is increased or Remain the same.Combined with the steering wheel angle changes to determine the specific starting time of the specific location.The concept of the pass-through intention factor CII is proposed and the CII is used to determine the rearview mirror process before the driver performs the track.Finally,use the driver to change the duration of the mirror and the sliding window determined by the CII to determine the starting point of the change of intent.The concept of robust factor ? is proposed in the process of quantitative calculation of the desired vehicle speed.According to the relationship between the robust factor and the actual vehicle speed,the driver 's expected speed is finally obtained.The actual vehicle speed is used as the index to establish the follow-up model,and the expected distance of all the drivers is calculated.Based on the foreground theory,the comprehensive expected foreground value of the current lane and the comprehensive expected foreground value of the target lane are determined.The comprehensive prospect of the current lane and the combined expected foreground value of the target lane are compared and analyzed.By comparing the difference between the intention stage and the driver's head movement and the eye movement-related parameters in the lane-holding phase,the driver's wish-changing intention mapping parameter is determined.The main conclusions of this paper are as follows:(1)The different groups of drivers intended to window width,including male for 2.57 s,female for 4.02s;skilled group of drivers for the 2.48 s,unskilled group of drivers for the 3.76s;youth group driver for the 3.91 s,middle age group driver 2.37 s,the elderly group driver for 3.56 s.It is found that the length of the window of the driver is different in different age groups and different driving hours.(2)From the previous analysis,it can be seen that the lane changing probability,the actual speed,the actual spacing,the expected speed and the expected spacing are the main factors influencing the expected foreground value before the lane change.The data analysis of the comprehensive expected foreground value of 10 s before the track shows that the decision stage is composed of the evaluation stage and the intention stage,and the difference between the evaluation window and the time window is not significant.(3)Conversion of road signs Characterization parameters: 1)basic eye movement parameters,including watching frequency,watching time,scanning time,scanning amplitude,scanning speed and horizontal direction of rotation angle standard deviation.2)Typical target gaze behavior includes the number of times and time of the rearview goggles,the percentage of attention of the rearview mirror,the percentage of the current lane and the target lane,the percentage of the target lane gaze,and the percentage of the current lane.3)the basic parameters of the head movement: head horizontal rotation angle standard deviation.